A childhood belief about work

I used to think that "moonlighting" was being a private detective, just like Cybil Shepard's TV series. Once, my mom and I bumped into one of my teachers at a department store (which, btw, I thought was impossible because teachers didn't have personal lives. I figured that in their free time, they sat at home and read books.), and when I asked my mom what she was doing there, she said that she thought she was moonlighting. My mom also told me to be quiet about it because my teacher could get into trouble if people at school found out (although, at this age, I don't think that qualified as violating a noncompetition agreement). I immediately translated this into her being a private detective, plus the fact that I was supposed to keep it hush-hush, so the next day I ran into school and told all my little friends that our teacher was a spy!